Machine for piecing together the threads of warps.



M. WENZEL.

MACHINE FOR PIEGING TOGETHER THE THREADS 0P WARPS.

APPLICATION FILED DEC. 17, 1912.

INVEN OR MAX WE NZ E L RWWSWQQ ATTORNEY THE NORRIS PEIERL :0.PHOIO-LIIHQ. WASH/NGiOII. D c

M. WENZBL.

MACHINE FOR PIEGING TOGETHER THE THREADS 0F WARPS.

APPLICATION FILED 1330.17, 1912.

Patented Mar. 30, 1915.

6 SHEETS-$111131 2.

F I G 2 k lNvENToR Wamassas MAY WENZEL ATTORNEY THE NORRIS PETERS 20..PHQTO-LITHQ, WASHINGTON. 0. c.

M. WENZEL.

MACHINE FOB. PIEGING TOGETHER THE THREADS OF WARPS.

APPLICATION FILED DEC. 17, 1912.

. Patented Mar. 30, 1915.

1 HE NORRIS PETERS CO. I=I-lon.1-L!'|l-mvv WASHINGTON, D. c

6 SHEETS-SHEET 3.

lNVENTOR MAX WENZEL.

M. WENZEL.

MAGHINE FOB. meme TOGETHER THE THREADS 0P WARPS.

APPLICATION FILED DEC. 17, 1912.

Patented Mar. 30, 1915.

6 SHEETS-SHEET 4.

INVENTOR MAX WENZEL. AHQMW Q l ATTORNEY I THE NORRIS PETERS 60..PHOT0-LITHO., WASHINGTON. D. c.

M. WENZEL.

MACHINE FOR. PIEGING TOGETHER THE THREADS 0P WARPS.

WITN E55 5% APPLICATION FILED DEG. 17 1912.

Patented Mar. 30, 1915.

6 SHEETS-SHEET 5.

THE NORRIS PETERS Ca, PHOTO-LITHO.. WASHINKIZTON. D. L.

INVENTOR MAX WENZEL GQMSMWA ATTORNEY M. WENZEL.

MACHINE FOE PIEGING TOGETHER THE THREADS 0F WARPS.

APPLICATION FILED DEO.17, 1912.

1,133,830. Patented Mar.30,1915.

6 SHEETS-SHEET 8.

INVENTOR MAX WENZEL ATTORN EY "HE NORRIS PETERS 60.. PHOTO Lrrna.WASHINGTON. n. c

MAX WENZEL, or sienna/refine, GERMANY.

MACHINE FOR PIECING TOGETHER THE THREADS OF WARPS.

Application filed December 17, 1912.

T all whom it may concern:

Be it known that I, MAX WENZEL, a citizen of the Empire of Germany,residing at No. 18 Miihlenstrasse, Spremberg, Kingdom of Prussia, Empireof Germany, have invented certain new and useful Improvement in Machinesfor Piecing Together the Threads of Warps, of which the following is aspecification.

In the process and the apparatus according to the patent application S.N. 7144 16 and 7 14447 the piecing of the ends of warp lying side byside is operated by spinning or whipping, and this is done by means ofone single piecing tool. Also all other appliances known hitherto forpiecing the ends of warp threads, as, for instance, warp threadattaching and warping appliances are possessed of only one single toolfor operating the piecing of the threads. Consequently, in all knownmachines only the piecing of one pair of threads during one operation ofthe machine is possible. Now, the number of operations of all theseappliances during a certain unit of time is limited by the fact that thespeed of the secondary appliances for parting and feeding the threads tobe pieced cannot exceed a certain rate. Besides, the maximum speed ofworking depends upon the material to be worked, because, of course,threads of bad, easily breaking material cannot stand the same speed ofworking as threads of better material. It is therefore impossible tosurpass per hour a number of threads of as great as 6000 to 8000 withthe machines and appliances known, even in straining their parts to theutmost by working them with the highest speed which is safe; and onlyone machine working with a knotting tool has surpassed this number.

By arranging a number of whipping appliances side by side, each havingto handle a pair of threads, an apparatus constructed according to thisinvention is able to piece together a number of threads simultaneouslyat each stroke thereby increasing the output many times withoutincreasing the number of strokes per unit of time, thus combiningmaximum safety with maximum output. This capacity of enabling a numberof piecing appliances to be arranged side by side differentiates theimproved apparatus from all hitherto known devices for piecing warpthreads, such as twisting and tying devices, all of which comprise onlyone piecing ap- Specification of Letters Patent.

Patented Mar. 30, 1915.

Serial No. 737,232.

pliance, so that only one piecing can be effected at each stroke.

The drawings illustrate a form of appa ratus comprising a number ofwhipping appliances for piecing together a number of pairs of threads ateach stroke of the apparatus.

In these drawings: Figure 1 is a perspective diagrammatic general viewof the 00 operating devices, Fig. 2 being a plan, Fig. 3 a rearelevation, and Fig. 4 a side elevation thereof, Figs. 5, 6, 7 and 8illustrate details of the device employed for separating and conveyingthe ends of the threads to be pieced, and gripping and severing thesame.

In the apparatus comprising several whipping appliances (Figs. 1 to 8)the whipping appliances 6 (Figs. 1, 3, 4, 6) have the form of disks withteeth 2 and radial insertion slots 3 for the threads. In each whippingappliance one separate thread is used for whipping around the warps,which thread is fed to the appliance in the same manner as described inapplicants Patent 1,098,308. In the example shown, three such whippingappliances are arranged side by side. They are mounted so as to becapable of rotary movement but not of axial sliding movement in aplate-shaped carrier 4 which is movable parallel to itself along thewarp threads. The plate-shaped carrier a slides on fixed guide bars 5, 6that are fixed to the sides 7, 8 of the framing. The carrier 4 of thewhipping appliances 6 receives its parallel motion along the warpthreads as above stated for the purpose of carrying the whipping threadin some path or other toand-fro along the warp threads. The path chosenin the example shown in the drawings, is indicated at D in Fig. 3. Sinceat each operation of the machine the carrier 4 of the whippingappliances is required to make a movement only during the actualwhipping process, the said movement may be produced by means of asuitable shaped cam 9 on a cross shaft 10 which is driven in the ration1:1 from the main shaft 11 (Figs; 3 and 4) of the machine. This shaft 11makes one complete revolution for each complete operation of the machineand is driven for instance by an electric motor 12 (Fig. 3) through aworm 13 and worm wheel 14. This worm wheel is not fixed directly on themain shaft 11 but is loose thereon and is connected thereto by a clutch15 slidable along the shaft 11. This clutch has a breaking cone 16 whichengages a fixed female cone 17 when the clutch 15 is moved intoengagement by electromagnetic or mechanical means by the thread stopmotion devices when the check thread is absent as hereinafter described.

On the shaftlO there are preferably provided two cams 9 each of whichacts upon a lever 19 in opposition to a spring 18. The levers 19 have acommon rocking axle 21 and the free ends of their arms are connectedtogether by a cross bar 22 attached to a link 20 the other end of whichengages a fork 23 fixed on the carrier 4 of the whipping appliances.

The whipping appliances e receive their rotary motion in common from themain shaft 11 of the machine. On this shaft is a toothed wheel 24 (Fig.4) the teeth of which extend over only grds of its circumference, whichis adapted to engage a smaller intermediate wheel 25 on an intermediateshaft 26. On this latter shaft is a spur wheel 27 with broad teethengaged by a spur wheel 28 on the the carrier 4. The teeth of the wheel27 are sufficiently broad to prevent the wheels 27 and 28 from comingout of engagement during the parallel motion of the carrier (Fig. 2).The wheel 28 engages the ring of teeth 2 of the whipping appliance e andalso a small intermediate wheel 29 which transmits its motion to thedriving wheel 28 of the whipping appliance e and engages a second smallintermediate wheel 29 which in its turn engages the driving wheel 28 ofthe whip ping appliance 6 The direct transmission of the rotary motionfrom one whipping appliance to the other is necessary because thewhipping appliances when stationary must always have their insertionslots 3 coinciding with the respective insertion slots 3 in theircarrier 4. Vertically below and parallel to the axis of rotation of themiddle whipping appliance 0 there is arrangedrso as to be rotatable butaxially immovable in fixed bearings a shaft 30 which carries 0pposite toeach other. two rings of teeth 31, 32 the tooth spaces of which receiveeach one end of a warp thread in such a manner that corresponding spacescontain those warp threads which are to be pieced. For the purpose offacilitating the introduction of the warp threads in the plane of thewarp and preventing their removal from the tooth spaces during thepiecing operation, pairs of guide wires 33, 34, are arranged directlyadjacent to the rings of teeth 31, 32 and preferably on both sidesthereof. These wires are fixed to the sides 7 and 8 of the framing. Theshaft 30 is 0 caused to rotate step by step by a ratchet mechanism theratchet wheel 35 (Fig. 4) of which is fixed on the shaft while the pawl36 rotates together with the spring pawl 37 loosely on the shaft 30. Thepawl 36 is connected by means of a connecting rod 38 to a slide 40guided vertically in a guide 39 on the outside of the frame wall 8. Thisslide is moved downward in opposition to an upwardly pressing spring 41by a tappet 42 on a shaft 43 parallel to the main shaft. According asthe rings of teeth 31, 32 are to be advanced only one tooth or a numberof teeth, the shaft 43 is rotated. in the corresponding ratio by meansof spur wheels 44, 45 from the main shaft 11. As the pitch of the teeth31, 32 corresponds to the dis tance of the whipping appliances 3 fromone another, the pairs of warp threads to be pieced are brought by theteeth 31, 32 each time into the correct position below the insertionslots 3, 3. (Fig. 4). The warp threads can then be raised in pairs inthe manner wellknown in twisting machines out of the plane of the warpinto the whipping appliances. It is however necessary first to efiect acomplete separation of the threads from one another over their entirelength between the rims of teeth 31, 32 so that later on only those endsof the warp threads which belong to each other shall lie close to eachother. For this purpose a separating device is provided the separatorsof which are moved along the warp threads after each separator hasengaged only one warp thread. The separators consist of grippers offorks 46 arranged on common carriers 47 47 and fixed to endless bands orchains 48, 48 which are mounted on guide rollers49, 50, 51 and 49, 50,51. The carriers 47, 47 of the separators 46 have guide arms 52, 52which are adapted to slide in guides 53, 53 fixed to the frame sides 7,8 (Fig. 4). These separators 46 also serve to secure the parallelposition of the warp threads relatively to one another so that they canbe securely grasped by the grippers or tongs which convey the Warpthreads into the whipping appliances.

The endless belts 48, 48 with the separators are driven from the mainshaft 11 (Figs. 2, 3, 4) by means of bevel wheels 54, 55, cross shaft56, bevel wheels 57, 58, vertical shaft 59, bevel wheels 60, 61 andcross shaft 62. On the latter shaft is a spur wheel 63 gearing with aspur wheel 64 on the extended axle 65 of the guide roller 49.

On the extended axle 65 is a second spur wheel 66 gearing with anintermediate wheel 67 on a pin 68 parallel to the axle 65, which wheelgears with a spur wheel 69 on the extended axle 70 of the guide roller51. vThe ratio must be such that a group of gripping devices, cut awayfrom their holding clamps K and K and inserted into the insertion slotsof the whipping appliances. The separation of the warps and the clampingthereof in the desired position in clamps K, K is also effected in themanner described in Patent 1,098,308. The clamps in that patentcorresponding to the clamps K, K of the present application are numbered120 and 121. One of these gripping devices with severing devices isshown in Figs. 6, 7, 8. The grippers for all the pairs-of threads areconnected together by a common cross piece 71, 71 which is guided bymeans of vertical guide bars 73, 73 in guides 7 2, 7 2 which are fixedtogether with the guides 5 and 6 of the carrier 4 of the whippingappliances to the frame sides 7, 8. The upper ends of the guide bars 73,-73 carry pins or rollers 74, 74 by means of which they engage in camgrooves 75, 75 of cams fixed on a common shaft 76. The shaft 76 isdriven from the main shaft 11 in the ratio of 1:1 by means of spurwheels 77, 78 (Figs. 2, 3, 1). The gripping devices consist of forkseach having three prongs 79, 80, 81. The two side prongs 79 and '81 arebent outward while the middle prong is wider and is formed on one sidewith a cutting edge (Fig. 8). Parallel to the plane of the prongs thereis pivoted on a pin 82 on the fork a hook 83 the shank of which carriesa spring clamping jaw 84 which cooperates with a clamping jaw 85 fixedon the fork behind the middle prong 80. To the hook 83 there is fixed asmall tooth segment 86 gearing with a toothed segment 87 which ispivoted on a pin 88 on the fork. The segments 87 are under the influenceof springs 89 which have a tendency to turn the segments in such amanner as to cause the hook 83 to assume the open position shown in fulllines in Fig. 7.

The segments 87 of each group of grippers are connected together by aconnecting rod 90 one end of which is connected to a lever 91 whosepivot 92 is fixed on one of the outer forks of the group. In the descentof the gripping devices the lever 91 strikes with its free end against afixed stop which moves it into the position shown in dotted lines in(Fig. 7). In this movement a spring pawl 93 drops over the lever 91 or aprojection thereof so that this lever retains the position shown indotted lines in Fig. 7 during the following ascent of the grippingdevices.

In the movement of th lever 91 from the drawn out position into thedotted position shown in Fig. 7 all t'he segments 87 make acorresponding rotation which causes the hooks 83 to pass from the drawnout position shown in Fig. 7 into the dotted position. By this means thegap between the prongs 79, 80 of the forks is closed by the hook and thewarp thread that has entered this gap is shut in by the hook, while theother warp thread is clamped by the spring jaw 81 on the shank of thehook 83 and the fixed jaw 85 and the end of this thread is severedbehind the clamping point by the cutting edge on the middle prong 80.This severing action can be improved by providing a counter cutting edge(Fig. 8) on the shank of the hook 83 which moves close above the middleprong 80. After the threads (6 and I) have been taken up and severedalternately in this manner the gripping devices are moved up by the cams75, 75. These cams are formed so that the raised position will bemaintained so long as is necessary for the following whipping operation.On the next downward movement of the gripping devices the lever 93 mustbe disengaged in order that the ends of the warp threads which are heldby the grippers shall be released and the grippers shall assume aposition ready for receiving the next warp thread ends. For this purposeat the commencement of the downward movement a pivoted spring shoulder94 on the pawl 93 strikes a fixed stop 95 which the pivoted part 94 wasable to avoid in the upward movement and is disengaged so that thesprings 89 can act and return the grippers into the position shown infull lines in Fig. 7.

For the purpose of returning the whipping appliances always and exactlywith the insertion slots 3 of their carrier, when the whipping operationis completed, there are provided braking and locking devices which inengaging the teeth 24. of the driving wheel of the main shaft 11, aredisengaged and engaged when the teeth 24tleave the wheel 25.

The several threads are taken singly out of the lease by means ofsuckers 96 (Fig. 5). For each lease there is provided a pair of suckersof which each works on one side of the lease. The mouths of the suckersare of trough shape. These troughs extend along the warp threads whichare to be taken by the respective sucker from the lease. The mouths ofthe suckers which operate in the middle of the lease are arrangedtransversely to the warp threads which are not to be taken by the saidsucker and they force back the threads which are not yet pieced. Infront of the suction aperture which is recessed in the mouth-piece, aspring looking pin 97 is passed transversely through the mouthpiece.This locking pin is mounted on the arm 98 of a bell crank lever 98, 100,pivoted on a pin 99 on the sucker 96. The arm 100 of this lever isforced back by a fixed stop 101 when the sucker is in its position oftaking up, in such a manner that the locking pin 97 leaves themouthpiece aperture for the entry of the thread unobstructed.Immediately the sucker leaves its taking up position, the arm 100 leavesthe fixed stop 101 and it is forced by its spring 102 into the lockingposition.

In order that the locking pin 97 shall release the thread after thelatter has entered the corresponding toothed space of the ring of teeth,a bell crank lever pivoted on an upwardly directed bracket 143 on thesucker strikes with its arm 144 against a correspondingly fixed stop 146while the arm 145 of the bell crank lever acts upon the arm 100 of thelocking pin lever with a tendency to raise the locking pin 97. Normallythe bell crank lever 144, 145 is forced with its arm 144 by a spring 147against the stop 148 V on the bracket 143 whereby the bell crank leveris secured in its rest position.

In order to impart to the sucker the necessary motion for conveying thetaken up thread into the gap of the corresponding ring of teeth, thesucker 96 which is formed as a tube, is pivoted by means of a cockpluglike pin 103 on the lower end of a hollow arm 104, the eye 105 ofwhich receiving the pin 103 is constructed in the form of a cock casing.The bores of the eye 105 and of the plug like pin 103 are so arrangedand dimensioned that their complete openings will coincide with eachother when the sucker is in its taking up position (Fig. 5 left handside). On the upper end of the hollow arm 103 there is also formed aneye 106 having the shape of a cock casing rotatable on a hollow pin 107which is fixed and from the bore of which there extends a side aperturecoinciding with the bore 108 of the eye 106 in the taking up position ofthe sucker 96. The hollow pin 107 is fixed to a suction pipe. Thearrangement is such that the current of the suction is controlled by themovements of the sucker 96 and the arm 104 so that the suction will beoperated only in the taking up position of the sucker.

The arm 104 is fixed to an inclined arm 109 engaged by a crank rod 110which engages at its other end a crank pin 111 on a crank shaft 43 thatis parallel to the main shaft 11. The shaft 43 is driven from the mainshaft-11 by means of toothed wheels 44, 45 in the ratio of 3:2, twopairs of suckers being provided which operate alternately and togetherhave to deliver three pairs of threads for each operation of themachine. In addition to their to-and-fro motion the suckers must alsohave an up and down motion because they must be moved out of the path ofthe delivered warp thread when they are in position for delivering thethread. For this purpose rocking links 115 having a variablelongitudinal elasticity are provided which are adapted to rock on acommon pin 116 and are pivoted at their lower ends to the suckers 96. Attheir upper ends the links 115 have a lateral guide pin 117 which movesin a guide curve 119 which is closed upon itself and is provided with'aspring switch tongue 118.

For the purpose of checking the groups of threads, each of thread of thelease is preferably passed at each side of the lease over a separate rod120 (Fig. 1) so that it is situated on a higher level outside the leasethan the other threads. In this higher position the check thread C isable to act upon the stop lever 121, 122 of which the lower arm 121carries at its end a shoe 123 arranged across the length of the warp.The stop lever is pivoted on a fixed pin 124 and the free end of itsupper end 122 projects into the path of the contact piece 126 arrangedon a stop disk 125 so that by means of the stop lever 122 and thecontact piece 126 an electrical circuit can-be closed containing asource of current and the stopping electromagnet E (Fig. 2). The stopdisk 125 is moved onward by ratchet mechanism 127 to 134 the number ofthe step by step movements corresponding to the number of the threadscomprised in one stop group. The ratchet wheel of the stop disk can haveonly a determined number of teeth. It is however not always possible tomake the number of threads in the check groups equal in all warps.Therefore means must be provided to enable the number of step by stepmovements of the stop disk 125 to be varied according to the varyingnumber of threads in the check groups. This can be done withoutdifiiculty by arranging the stop disk 125 so as to be capable of beingrotated forward and backward and providing it with two oppositelyworking ratchet mechanisms whose ratchet wheels have the same number ofteeth. It is then merely necessary to provide an automatic reversing ofthe two ratchet mechanisms and to arrange on the stop disk in additionto the contact piece 126 a removable contact piece 126 which is fixed bythe contact piece 126 on the stop disk 125 in accordance with the numberof step by step movements or pitch corresponding to the number ofthreads. The drawings (Figs. 1, 2, 3) show a construction of a checkingapparatus of this kind. 127 and 128 are the two oppositely actingratchet wheels which are fixed on the shaft 129 of the stop disk 125 andin which pawls 130, 131 are adapted to engage. Both these pawls arefixed to a lever 132 and are pivoted on a common pin 133 which is fixedto a ratchet lever 134. To the latter is connected a connecting rod 135which receives to-and-fro motion from a cam 136 on the transverse shaft56. The pawls 130, 131 are reversed according to the desired directionof rotation of the stop disk 125 by means of two reversing levers 137,138, pivoted on a common shaft 112 parallel to the shaft 129. Eachreversing lever has a toothed rims locking are 149 and 149 respectivelyfiXed to it into which a spring 153 or 153 acting upon a bell-cranklever 151, 152 or 151, 152 has a tendency to force a locking pin 150 or150 which is mounted on the arm 151 or 151 of the bell-crank lever(Figs. 1 and 3). The locking mechanism serves to hold each reversinglever in opposition to the action of a spring 113, 114 on its other andupwardly directed arm 137 or 138 in the position shown in Figs. 1, 3 and4. The levers are released by means of removable pins 154, 154 providedon the stop disk 125, as soon as the one or the other contact piece 126or 126 has moved into the contact position, so that one or the other pin154, 154 acts upon the corresponding releasing lever 151, 152 or 151,152. The spring 113 or 114 then imparts to the respective reversinglever a rotation such that it will rotate the common arm 132 of the pawl130, 131 into the other position and thus cause the other pawl to engagewith its ratchet wheel. The stop disk will then be rotated in thereverse direction. The immediate returning of the correspondingreversing lever after reversal is efiected by means of side pins 155,155 of a slide 156 which receives a continuous to-and-fro motion througha connecting rod 157 and crank 158 from a shaft 159 which is driven fromthe shaft 56 in the ratio of 1:3, so that the slide is moved to-and-froonce at every double stroke of the pawl. The pins 155, 155 act upon theupwardly directed arms 137 and 138 of the reversing levers 137, 138. Onreaching the position of rest the looking pin 150 or 150 enters againinto the locking are 149 or 149. The closing of the circuit effected bythe checking apparatus energizes the electro-magnet E (Fig. 2) thearmature 140 of which is movable in oppo- .sition to a spring 139 andserves as a support for a weighted lever 141 which on being releasedswings down and by means of the disengaging lever 142 fixed to it shiftsthe clutch part 15 on the main shaft 11 in such a manner thatthecoupling of the shaft 11 with the worm wheel 14 is opened and thebrake cone 16 is driven into the fixed female cone 17 whereby the mainshaft 11 is disconnected and stopped immediately.

The operation as a whole of the apparatus is as follows :The warpthreads of the two warps that it is desired to be pieced together whichare to be fed simultaneously to the whipping appliances e are taken upsingly by the suckers 96, 97 and transferred upon the successive gaps ofthe stepwise rotating 31, 32 from which they are brought finally underthe slot shaped opening in the whipping appliance 6. At the ,same timetheseparating means 46, 47, fixed to the endless bands 48, 48, moving inopposite direction, separate the threads and place them in parallelposition. Now the warp threads which lie exactly parallel the one neXtto each other and in a straight line, are each taken up by one of thewhipping appliances to which a separate whipping thread is fed asdescribed in Patent 1,098,308 and the whipping takes place in the samemanner as described in that patent except that here it takes placesimultaneously in the three whipping appliances. The finished threadsare then fed farther by the toothed rims 31, 32. If one of thecontrolled threads C should miss, the two warps so far as the controlledthreads are concerned will not agree so that when the machine proceedswrong threads of both warps will be pieced and in such case the stoppingmechanism will enter into operation by the dropping of the lever on 121.The machine is stopped thereby and the mistake can be corrected at oncebefore as might have happened before, a number of the wrong threads ofboth warps have been pieced together which had afterward to be separatedagain.

What I claim is:

1. In a machine of the kind described for piecing together the ends ofwarp threads, a number of whipping appliances arranged side by side andmeans for simultaneously conveying a pair of threads to each whippingappliance, essentially as described and for the purpose set forth.

2. In a machine of the kind described for piecing warp threads, thecombination of a plurality of whipping appliances arranged side by sideand each provided with an inserting slot; means for guiding thereto theends of the warp thread to be pieced; coaxially arranged toothed ringsone for each set of warp threads, the pitch between the teeth thereofbeing equal to the required width between the threads to be pieced, eachring being adapted to receive in the gap between adjacent teeth onethread to be pieced; and means for rotating said rings step-by-step.

'3. In a machine of the kind described for I piecing warp threads, thecombination of a plurality of whipping appliances arranged side by sideand each provided with an inserting slot; means for guiding thereto theends of the warp thread to be pieced; coaxially arranged toothed ringsone for each set of warp threads, the pitch between the teeth thereofbeing equal to the required width between the threads to be pieced, eachring being adapted to receive in the gap between adjacent teeth onethread to be pieced; means for rotating said rings stepby-step; meansfor separating the warp threads in said gap over the entire length andholding the separated threads in the right position for insertion intothe whipping appliances for subsequent whipping.

1 In a machine of the kind described for piecing warp threads, thecombination of a plurality of whipping appliances arranged side by sideand each provided with an inserting slot; means for guiding thereto theends of the warp thread to be pieced; coaxially arranged toothed ringsone for each set of warp threads, the pitch between the teeth thereofbeing equal to the required width between the threads to be pieced, eachring being adapted to receive in the gap between adjacent teeth onethread to be pieced; means for rotating said rings stepby-step;separators to hold the warp threads between the toothed rings over theentire length and for holding the warp threads in the right position forinserting into the whipping appliances, said separators being mountedbetween said rings for movement along the warp threads; and means formoving the separators in the same direction along the warp threads.

5. In a machine of the kind described for piecing together the ends ofwarp threads, a number of whipping appliances arranged side by side;means for simultaneously conveying one pair of thread ends to eachwhipping appliance; one pair of lease rods each for each warp end; onespaced lease rod for each m thread of each warp end, which special leaserod is located higher than the corresponding lease rods; a contact leverin whose path the threads running over the higher special lease rod arelocated; a stop disk (125) a contact (126) mounted on the said stopdisk; means for rotating the stop disk with the contact piece inproportion to the feeding of the thread and a stop circuit which may beclosed by the contact lever and the contact piece (126) when one of thecheck threads guided over the higher lease rods is missing, essentiallyas described and for the purpose set forth.

6. In a machine of the kind described for piecing together the ends ofwarp threads, a number of Whipping devices arranged side by side; meansfor simultaneously conveying one pair of thread ends of each whippingappliance; one pair of lease rods each for each warp end; one speciallease rod for each tenth thread of each warp end, which special leaserod is located higher than the corresponding lease rods; a contact leverin the path of which the threads running over the higher special leaserod are located; a stop disk; a contact mounted on said stop disk; meansfor rotating the stop disk with the contact piece in proportion to thefeeding of the thread; a stop circuit which may be closed by the contactlever and the contact piece when one of the check threads guided overthe higher lease rod is missing; a removable contact piece (126' mountedupon the stop disk; two ratchets operating in opposite direction whichcan be made to cooperate alternately with the stop disk reversible pawlsmounted upon said ratchets and means for reversing these pawls in orderto reverse the motion of the stop disk when either the fixed or themovable contact piece have reached the contact position, essentially asdescribed and for the'purpose set forth.

7. In a machine of the kind described for piecing together the ends ofwarp threads, a number of whipping appliances arranged side by side;means for simultaneously conveying one pair of thread ends to eachwhipping appliance; means for holding in position both the warp endsthat have to be pieced together; one pair of lease rods for each warpend for producing leases; two suckers each for each lease to draw outthe single thread ends; means for making the suckers operate alternatclyto the right and to the left in the corresponding leases at the placewhere the threads cross each other; and mouth pieces for the suckerswhich serve for pushing away in the leases the threads which should notbe drawn out, essentially as described and for the purpose set forth. 5

8. In a machine of the kind described for piecing together the ends ofwarp threads, a number of whipping appliances arranged side by side;means for simultaneously conveying one pair of thread ends to eachwhipping appliance; means for holding in position both the warp endsthat have to be pieced together; one pair of lease rods for each warpend to produce leases in the warp ends; two suckers each for each leaseto draw out the single thread ends from the lease; means for making thesuckers operate alternately to the right and to the left in thecorresponding lease at the place where the threads cross each other;mouth pieces for the suckers; grooves in these mouth pieces running inthe direction of the thread which is to be drawn out of the lease andsuction openings in said mouth pieces located deep in the grooves,essentially as described and for the purpose set forth.

9. In a machine of the kind described for piecing together the ends ofwarp threads, a 7

number of whipping appliances arranged side by side; means forsimultaneously conveying one pair of thread ends to each whipatealternately to the right and to the left in the corresponding lease atthe place where the threads cross each other; mouth pieces for thesuckers; grooves in these mouth pieces running in the direction of thethread which is to be drawn out of the lease; suction openings in saidmouth pieces located deep in the grooves; automatic locking de-' vicesfor holding the sucked thread in the mouth piece of the sucker; meansfor moving the suckers from the leases to the whipping appliance andvice versa; and means for cutting ofl the suction current from thesuckers during the motion of the latter from the leases to the whippingappliance, essentially as described and for the purpose set forth.

10. In a machine of the kind described for piecing together the ends ofwarp threads, a number of whipping appliances arranged side by side;means for simultaneously conveying one pair of thread ends to eachwhipping appliance; means for holding in position both the warp endsthat have to be pieced; one pair of lease rods for each Warp end toproduce leases in the warp ends; two suckers each for each lease, todraw out the single thread ends from the lease; means for making thesuckers operate alternately to the right and to the left in thecorresponding lease at the place where the threads cross each other;mouth pieces for the suckers; grooves in these mouth pieces running inthe direction of the thread which has to be drawn out of the lease;suction openings in said mouth pieces located deep in the grooves;automatic locking devices for holding the sucked thread in the mouthpiece of the sucker; means for moving the suckers from the leases to thewhipping appliances and vice Versa; hollow rods in the sucker joints inthese hollow rods and cook shaped joint pins in the joints, essentiallyas described and for the purpose set forth.

In testimony whereof I aflix my signature ,in presence of two witnesses.

MAX WENZEL. lVitnesses:

GEORGE A. MAKINSON, PAUL WALTHER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of .Eatents. Washington, D. G.

